2.1.677 Part 1 Section 19.429, script:event-name

a.   The standard defines the attribute script:event-name, contained within the element <presentation:event-listener>

This attribute is supported in PowerPoint 2013, PowerPoint 2016, and PowerPoint 2019.

PowerPoint only supports the dom:click and dom:mouseover events.

This attribute is supported in PowerPoint 2013, PowerPoint 2016, and PowerPoint 2019.

Only the dom:click and dom:mouseover events are loaded/saved by PowerPoint (See section 9.9). Other events are not supported.

b.   The standard defines the property "dom:mouseover", contained within the attribute script:event-name, contained within the element <presentation:event-listener>

This property is supported in PowerPoint 2013 and PowerPoint 2016.

PowerPoint only supports this property on shapes. It is not supported on text.